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Homestake meeting, 10/16/14
Attending: Vuk, Riccardo, Tanner, Victor, Pat, Gary
Homestake wiki: https://zzz.physics.umn.edu/groups/homestake/home
Our agenda:
1) Homestake update
Vuk: Liteway expects to deliver 4 GPS transceivers next week, and the rest in 2-3 weeks. Should know more precisely early next week. Gary and Vuk spoke with PASSCAL, they expect to be able to send us 8 full stations in 2 weeks. Add another 1-2 weeks for shipping etc, we could start installing them around Nov 15. So, we should start making plans for another trip around that time. Could install 4-5 surface stations and 3-4 underground stations (probably focus on 4850 for the time being, maybe also try 4100-A as our best former station). Will need at least Gary and Tanner.
Daniel and Victor unlikely to make it in Nov.
Pat it would depend on the exact days, but could try.
Gary could be there for 3 days, more than that would be hard.
Tanner could go for a week or so, will have to work around another trip.
Two surface stations per day should be doable. Similar for underground, assuming power and network are setup.
Gary: PASSCAL has radios available. Tim Parker talked about devices to switch power on and off, such as radios or GPS devices underground. Small devices consuming low power, with dip switches to set the duty cycle. Radios are 5W, solar panels should provide 120W (two 60W panels), so we may be ok, and use one battery. So we may be able to work without these switches on the surface, should look at the details. Underground at battery powered stations this may be useful, but we have to check the timing accuracy if the GPS transceivers are off for 6 hours or 12 hours. Will have to experiment in situ. Possibly look at this during the upcoming trip.
For this trip, probably leave the highschool site for later, but the other 5 could be done during this trip.
Could use smart chargers for batteries even at AC powered stations. So could use one battery per station underground as well. So, we want to order 8 batteries before this trip.
Plan to install the radio antenna near the GPS antenna on the roof of the admin building. Could be an issue for the Yates station, but it is close so hopefully will work.
Tanner: PASSCAL provides clamps to attach to power supply, but we should do something better.
Gary: Normally you get a cable that ends with a ring connector that could connect to the battery directly. Should talk to PASSCAL and let them know that this is what we want.
Tanner: what about the surface computer.
Gary: they will send us a Linux box with 2 or 4 ethernet ports, and will be pre-built and ready to go (with antelope installed). We will need to configure the parameters and IP addresses, but should be straightforward.
2) UMN test setup (Tanner)
Tanner: q3302orb running and putting data into a buffer. orb2db grabbing data from buffer and move into files. Currently not saving all the relevant data. So we have to sync the configuration files. Tim at PASSCAL should be able to help with this.
Tanner should contact Tim directly and interact with him to set it up.
3) Analysis of existing data